diff --git a/SUMMARY.md b/SUMMARY.md
index 92fd2cc..7c9204e 100644
--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -11,7 +11,7 @@
 * [接口](04_interfaces.md)
 * [函数](05_functions.md)
 
-# 进阶
+## 进阶
 
 
 * [泛型](06_generics.md)